Mold



July 17, 1923.

G. K. MONROE MOLD 31 1922 3 Sheets-Sheet 1 Filed Jan.

' July 17, 1923.

5 Sheets-5heet 2 Filed Jan. 51. 1922 July 17, 192;.

1.461.929 G. K. MONROE w.

MOLD Filed Jan. 31. 1922 3 Sheets- Sheet s To all whom-italic comer nu".

Patented July 17, .1923.

"GILBERT K. Mormon, or- SIDNEY, oHIo.

T FmE-r Mom).

Application filed January 31, 1922. Serial No. 532,989.

Be. it, known that I, GILBERT K. non, a citizen of the United States,resid; ing at Sidney, in the county of Shelby, and State of Ohio, haveinvented certain i new and useful Improvements in Molds, of

there is employed a collapsible core and j I mortar board.

an outer separable wall.

f One of the objects of the invention is to providea structureof simpleand cfiective form for supporting the mold proper during the pouringoperation, so. arranged that ,it'fcazn be readily removed: from the moldafter the pouring has been.

, 3 completed and immediately used for the purpose of supporting anothermold for casting purposes; themolds proper. being left intact about thecasting until the cur-. ing operation is .completed.

A further object of the invention is to provide in a. supportingstructure referred to, or outer jacket as it will b e called,

means for centering the walls of the'mold. therein, and for properlyspacing saidv walls with respect to each other; a more.

specific object inthis connection being to provide an improved form ofpallet for supporting and spacing the lower ends of the mold walls, andfalso to provide means on the outer jacket operable to.

center the core when about the mold; A further object of provideimproved means for expanding the jacket is closed the core and holdingthe same in expanded position du the casting.

A further object of the invention is to ringthe pouring andcuring ofprovide a mold construction whichjwill be simple in construction,effective in operatlon 'and economical in manufacture and use. H

In the accompanying drawings;

Fig. 1 is a top plan viewwvith the mor- -tar board removed. j

Fig. 21s a v ew of one side of the structure.

Fig. 3 is a View of the opposite side,

of the same.

Fig. & is; a bottom plan,

MoN-

the. invention is to i F 5 isa vertical section Figf 6 is a transversesection on; the

line 6-6 of 2.

Fig. .7 is a topplan showing the. man}. ner of removing the outerjacket,

Fig. ,8 is a top plan showing the imor- 5 tar board'and trowel inposition. H Fig. 9 s. a perspective view trowel.

Fig. 1 0 is a vertical section ot the up-l showingthe per portion; ofthe structure mortar board and .trowel. i

;Fig. '11 is Fig. 12. is a to p plan ,5

one of the core expanding rings. Fig. 13 is. a sectionon the line 13%13of Fig. 12.

Referring ,tothe of the 1 perspective View i drawings, 1 represents theinner wall or core of the mold, formed of a single piece ofsheet metalbent to M cylindrical form, theside edges oi'fivhich overlap ,asshowna-in Fig. 6. The outer.

wall ofithe mold proper is indicated at .2,

and this .wall is lik ewise formed of a single piece of sheet metal bentto" cylindrical form, the side edges of which have;

connectedtherewithaligned eyes 3 of sheet metal to receive :a removable.rod 4: to.

thereby temporarily hold the wall 2 in cylindrical form. formed of twosheet metal sections 5 and 6 having two of the side edges hingedtogether by the hinges 7 and the .othera edges provided with deviceswhereby the acket. may be contracted and expanded.

One set of these devices is. located atthetop and another set at thebottomof the jacket and each consists of a'lever 9 piv- The vouterjacket is" otally connected with a U-shaped rein forcing ring 8 withwhich. the jac'ketfsections are preferably provided and havingvpivot-ally connected therewith a short distance from its pivotal point alink,9, hav

ing a notch 10 on its inner side near the.

outer end thereof whereby the. link may be engaged with a pin llicarried-by the; ring 8 on the other section 5. By manipulating thelevers 9 the jacket section may be. contracted or expanded. i

Coopeating with the bottom The v outer edge of the horizontalportion ofof the jacket section and their lower rein of outer acket, is a basering or pallet 12 ofT-shap ed form in cross-section, as shownin Fig. 5;

the pallet is clamped against the lower edges rests upon the horizontalportion ofthe pallet'and to support the core the pallet has a series offingers 12*, which project inwardly from the Vertical part of the palletin a horizontal plane below that of the horizontal part of-the pallet.

For the purpose of expanding the core, thereare two preferably U-shapedsplit expanding rings 16' employed. Each of these rings has pivotedthereto near its ends a'palr ofsubstantially L'-shaped levers 17 w ichare in turn pivoted together at-the points of the juncture of the armsof the respective levers, by the pin 18. To hold the rings in contractedposition a short rod 19 is pivoted to one lever 17 of a pair and has ahook 20 to engage an eye 21 on the other lever of the pair, thehookbeing. disengaged from the eye before the levers are manipulated toexpandthe ring against the inner wall of shelf for a mortar board'2l;the board having downwardly projecting lips 25 fitting the inner edge ofthe shelf to hold the] board in position; one of these lips be ingplaced between the inwardly extending lugs 22 1 (Fig. 1) and another lipagainst the opposite lug 22 to keep the board from turning. A trowel 26has on its rear side an eye 27 which may be loosely fitted over thevertical stem 28 of the mortar board,the outer end of the trowel havinga handle 29 and a portion26 bent I at right-angles to the main portion26 and lying immediately above the upper edge of the outer wall 2 whenthe trowel is in working position. The trowel extends across the boardon a line passing at one side oi the center of the board so that theeffect of the rotation of the trowel is'to sweep the material into themolding space.

To center theupper portion of the core when the jacket is contracted,the upper reinforcing ring 8 of the jacketsection carries a series ofcentering devices, each consisting ofaj'horizontal finger 30 having avertical shank 31, square in "cross-section and hav- V ing areducedrounded extension 32. The

shank lies in a square opening 33 "in the upperhorizontal portion of thetopring 8 The limit of expansion of the while the extension 32projects-through a round opening in the lower horizontal portion of thering. Before the core and outer wall of the mold areinserted in the jacket,.

these fingers standat right-angles to the position shown, but after theinsertion of the core and wall, the fingers are turned to the positionshown by lifting their shanks from the square openings 33, giving thefingers a quarter turn and again placing the shanks in the openings, sothat when the jacket is'contracted the fingers will engage the ring 22and thus center the upper portion of the core inthe outer wall 2.

The parts are assembled for the purpose of making a casting by firstattaching the base ring or pallet to the lower edge of the jacket'byplacing the outer horizontal portion of the pallet under the flangesofthe nuts 13 and then tightening the nuts. The

latches 9 are then engaged with the pins 11 and the levers 9 turned tocontract the jacket. Next, the collapsible core is inserted I in theacket with its lower end resting on in the core near the lower endthereof and expanded and the other expansible ringinserted in the corenear the upper end therefor but left temporarily contracted. The ring 22is then inserted over the upper end of the core. is then inserted in thejacket, first expanding the top of the jacket by manipulating the upperlever 9. The centering fingers 30 at the top of the jacket" are thenturned to position' and the upper end of the jacket contracted or closedwhich causes the fingers to contact the ring 22 and center the core. Themortar board is then placed on the top of the core retaining ring 22 andthe trowel inserted on the board. The material form ing the casting isplaced on'the mortar board and by then rotating the trowel the materialis fed to the space between the core and outer wall of the mold. V v

After the casting has been completed the entire structure, minus themortar board and trowel, is removed to the curing place. The jacket isthen removed by manipulating the levers to expand its walls, the extremeends of the links 9 being placed against the pin 11 to assist inseparatingthe acket from the inner wall, if necessary. The ring 22 mayalso be removed. The rest of the structure is left intactto permit thematerial of the cast-' ing to cure orset. After setting, the mold isturned upside down and the pallet removed.

The core expanding rings are then released and removed and the corecontractedand re- The outer wall 2' of the mold base ring, upperretaining ring and core' can panding rings, which master jacketmay be iremoved as soon as the pouring of the cast ing is complete and may beused with another setof mold parts. This furnishes an economical andsimple molding, apparatus,

for the parts of the apparatus other than the jacket may be of thesimplest construction which may be duplicated in sufiicient IlIllIl-lher at a comparatively small expense to make a large number of castings.i

By the peculiar construction of the base ring described, including thesupporting fingers for the core, any material which leaks by thehorizontal portion of the'casting falls to the ground instead ofaccumulating and hardening on the ring, thus obviating the necessity ofcleaning the ring. By the construction of the core described it may beadjusted to different diameters to adapt it to different sized moldsorto regulate the thickness of the walls of the casting.

The mold structure described is adapted for operation on the line of theditch in which the tiling is to be used and may receive any suitableform of reinforcement for the material, as the tile may be moldedfromquite wet plastic material, but which may be puddled or spaded in themold to obtain a smooth surface and eliminate air pockets.

Having thus described my invention, I claim 1. In a structure of thecharacter described, inner and outer independent walls forming a moldingspace, an outer retaining member, and means carried by said member forsupporting said walls in spaced relation with each other.

2. In a structure of the character described, inner and outerindependent walls forming a molding space, an outer retaining member,and means carried by said member for supporting said walls in spacedrelation with each other, including a base ring to form a bottom for themolding space.

3. In a structure of the character described, inner and outerindependent walls forming a molding space, an outer retaining member,and means carried by said member for supporting said walls in spacedrela tion with each other, including a plurality of fingers to engagethe upper portion of the inner wall.

4. In a structure of the character described, inner and outerindependent walls forming a molding space, an outer jacket, togetherwith means for clamping the same to the outer wall, a base ring carriedby said jacket to support the lower ends of said walls in spacedrelation and to form a bottom for the space between said walls, andfingers can ried by the upper part of said jacket to en gage the upperend of the inner wall to center the same within theouter wall.

5. In a structure of the character described the, combination of aninner eX- pansible core together with means for holding the same inexpanded position, an outer wall cooperating with the core to form amolding space,anfenclosing jacket for said core: and wall, a base ringdetachably connected with said jacket and arranged to support the coreand wallin spaced relation with each other and forming a bottom for themolding space, means for clamping said jacket to said outer wall, andmeans carried by said jacket for centering the, upper end of said corein said outer wall.

6. In a structure of the character de scribed, the combination ofaninner, expansible core formed of: a single piece of sheet metal bent.to cylindrical form, an outer wall cooperating witlrsaid core to form a,molding space, an enclosingjacket for said parts having means forclamping the same to said outer wall, and means car ried by said jacketfor supporting and spacing the lower ends of said core and wall, a ringenclosing the upper edge of said core, means for expanding said core,and means carried by said jacket and engaging said ring for centeringthe core within said wall.

7. In a structure of the character described, the combination of aninner expansible core formed of a single piece of sheet metal bent tocylindrical shape, an outer wall cooperating with said core to form amolding space, an enclosing jacket for said parts including means forclamping the same against the outer surface of said wall, a base ringremovably attached to the lower end of said jacket, said ring having ahorizontal portion and a vertical portion and also having a series ofsupporting fingers projecting inwardly therefrom in a plane below saidhorizontal portion, said core being supported by said fingers and saidwall supported by-said horizontal portion of said ring, and meanscarried by said jacket for centering the upper portion of said core. j Y1 8. In a structure of the character described, inner andouterindependent removable Walls forming a molding space, an outerretaining member formed of two sections hinged together at two adjacentsides, means carried by the other sides for contracting said memberabout said outer wall, and means carried by said member for supportingsaid walls in spaced relation.

9.111 a structure of the character described, inner and outer wallsforming a molding space, an outer jacket formed of two sections hingedtogether at twoadjacent side edges, a plurality of levers carried meansfor holding said walls in spaced re lation, a inortar board supported onthe upper edge of said inner wall andtermi'nate ing at a'point adjacentthe space between said walls, and a revoluble member carried by saidmortar board and projecting to a pointover the space between said Wallsfor feeding materialto the molding spa'ceas the same'is revolved.

11. In structures of the character'described, inner and outercylindrical walls forming a molding space, means for holdingnsaid wallsin spaced relation, a mortar board carried by the upper end of the inner.12. In a structure of the character described, inner and outercylindrical walls, means for supporting said walls in spaced relation toeach other, said inner wall consisting of a single piece of sheet metal,and a plurality of expansible devices toexpand said inner wall, eachdevice consistingof a split ring and a pair of levers pivotallyconnected to said ring, one on each side of the split therein and alsopivotally coir nected together at intermediate points.

In testimony whereof, I have hereunto set my hand this 28th day ofJanuary, 1922.

' ei BERT KMONROE.

